169 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <algorithm>10 11// template<InputIterator InIter, class OutIter>12// requires OutputIterator<OutIter, RvalueOf<InIter::value_type>::type>13// && EqualityComparable<InIter::value_type>14// && HasAssign<InIter::value_type, InIter::reference>15// && Constructible<InIter::value_type, InIter::reference>16// constexpr OutIter // constexpr after C++1717// unique_copy(InIter first, InIter last, OutIter result);18 19#include <algorithm>20#include <cassert>21 22#include "MoveOnly.h"23#include "test_macros.h"24#include "test_iterators.h"25 26struct AssignableFromMoveOnly {27 AssignableFromMoveOnly(int i) : data(i) {}28 AssignableFromMoveOnly() : data(0) {}29 int data;30 AssignableFromMoveOnly& operator=(MoveOnly const& m) {31 data = m.get();32 return *this;33 }34 bool operator==(AssignableFromMoveOnly const& rhs) const { return data == rhs.data; }35};36 37#if TEST_STD_VER > 1738TEST_CONSTEXPR bool test_constexpr() {39 int ia[] = {0, 1, 2, 2, 4};40 int ib[] = {0, 0, 0, 0, 0};41 const int expected[] = {0, 1, 2, 4};42 43 auto it = std::unique_copy(std::begin(ia), std::end(ia), std::begin(ib));44 return it == (std::begin(ib) + std::size(expected))45 && *it == 0 // don't overwrite final value in output46 && std::equal(std::begin(ib), it, std::begin(expected), std::end(expected))47 ;48 }49#endif50 51template <class InIter, class OutIter>52void53test()54{55 const int ia[] = {0};56 const unsigned sa = sizeof(ia)/sizeof(ia[0]);57 int ja[sa] = {-1};58 OutIter r = std::unique_copy(InIter(ia), InIter(ia+sa), OutIter(ja));59 assert(base(r) == ja + sa);60 assert(ja[0] == 0);61 62 const int ib[] = {0, 1};63 const unsigned sb = sizeof(ib)/sizeof(ib[0]);64 int jb[sb] = {-1};65 r = std::unique_copy(InIter(ib), InIter(ib+sb), OutIter(jb));66 assert(base(r) == jb + sb);67 assert(jb[0] == 0);68 assert(jb[1] == 1);69 70 const int ic[] = {0, 0};71 const unsigned sc = sizeof(ic)/sizeof(ic[0]);72 int jc[sc] = {-1};73 r = std::unique_copy(InIter(ic), InIter(ic+sc), OutIter(jc));74 assert(base(r) == jc + 1);75 assert(jc[0] == 0);76 77 const int id[] = {0, 0, 1};78 const unsigned sd = sizeof(id)/sizeof(id[0]);79 int jd[sd] = {-1};80 r = std::unique_copy(InIter(id), InIter(id+sd), OutIter(jd));81 assert(base(r) == jd + 2);82 assert(jd[0] == 0);83 assert(jd[1] == 1);84 85 const int ie[] = {0, 0, 1, 0};86 const unsigned se = sizeof(ie)/sizeof(ie[0]);87 int je[se] = {-1};88 r = std::unique_copy(InIter(ie), InIter(ie+se), OutIter(je));89 assert(base(r) == je + 3);90 assert(je[0] == 0);91 assert(je[1] == 1);92 assert(je[2] == 0);93 94 const int ig[] = {0, 0, 1, 1};95 const unsigned sg = sizeof(ig)/sizeof(ig[0]);96 int jg[sg] = {-1};97 r = std::unique_copy(InIter(ig), InIter(ig+sg), OutIter(jg));98 assert(base(r) == jg + 2);99 assert(jg[0] == 0);100 assert(jg[1] == 1);101 102 const int ih[] = {0, 1, 1};103 const unsigned sh = sizeof(ih)/sizeof(ih[0]);104 int jh[sh] = {-1};105 r = std::unique_copy(InIter(ih), InIter(ih+sh), OutIter(jh));106 assert(base(r) == jh + 2);107 assert(jh[0] == 0);108 assert(jh[1] == 1);109 110 const int ii[] = {0, 1, 1, 1, 2, 2, 2};111 const unsigned si = sizeof(ii)/sizeof(ii[0]);112 int ji[si] = {-1};113 r = std::unique_copy(InIter(ii), InIter(ii+si), OutIter(ji));114 assert(base(r) == ji + 3);115 assert(ji[0] == 0);116 assert(ji[1] == 1);117 assert(ji[2] == 2);118}119 120int main(int, char**)121{122 test<cpp17_input_iterator<const int*>, cpp17_input_iterator<int*> >();123 test<cpp17_input_iterator<const int*>, cpp17_output_iterator<int*> >();124 test<cpp17_input_iterator<const int*>, forward_iterator<int*> >();125 test<cpp17_input_iterator<const int*>, bidirectional_iterator<int*> >();126 test<cpp17_input_iterator<const int*>, random_access_iterator<int*> >();127 test<cpp17_input_iterator<const int*>, int*>();128 129 test<forward_iterator<const int*>, cpp17_output_iterator<int*> >();130 test<forward_iterator<const int*>, forward_iterator<int*> >();131 test<forward_iterator<const int*>, bidirectional_iterator<int*> >();132 test<forward_iterator<const int*>, random_access_iterator<int*> >();133 test<forward_iterator<const int*>, int*>();134 135 test<bidirectional_iterator<const int*>, cpp17_output_iterator<int*> >();136 test<bidirectional_iterator<const int*>, forward_iterator<int*> >();137 test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();138 test<bidirectional_iterator<const int*>, random_access_iterator<int*> >();139 test<bidirectional_iterator<const int*>, int*>();140 141 test<random_access_iterator<const int*>, cpp17_output_iterator<int*> >();142 test<random_access_iterator<const int*>, forward_iterator<int*> >();143 test<random_access_iterator<const int*>, bidirectional_iterator<int*> >();144 test<random_access_iterator<const int*>, random_access_iterator<int*> >();145 test<random_access_iterator<const int*>, int*>();146 147 test<const int*, cpp17_output_iterator<int*> >();148 test<const int*, forward_iterator<int*> >();149 test<const int*, bidirectional_iterator<int*> >();150 test<const int*, random_access_iterator<int*> >();151 test<const int*, int*>();152 153 // Move only inputs154 {155 MoveOnly in[5] = {1, 3, 3, 3, 1};156 AssignableFromMoveOnly out[3] = {};157 auto result = std::unique_copy(in, in + 5, out);158 AssignableFromMoveOnly expected[3] = {1, 3, 1};159 assert(std::equal(out, out + 3, expected));160 assert(result == out + 3);161 }162 163#if TEST_STD_VER > 17164 static_assert(test_constexpr());165#endif166 167 return 0;168}169